Canonicalize the usage: lines for the POSIX toys.

This only touches 24 of the 68 toys/posix/ files --- the others were
already canonical.

Potentially contentious, so worth stating explicitly, is that there
were 8 matches for "COMMAND..." amongst all existing help output,
with 7 matches for various inconsistent variants involving something
with "ARG", so I resolved that in favor of using "COMMAND..." (which
is also shorter overall, and avoids nested []s).

24 files changed, 26 insertions, 26 deletions

diff --git a/toys/posix/cal.c b/toys/posix/cal.c
index aaed5933..33b15a17 100644
--- a/toys/posix/cal.c
+++ b/toys/posix/cal.c
@@ -10,7 +10,7 @@ config CAL
   bool "cal"
   default y
   help
-    usage: cal [[month] year]
+    usage: cal [[MONTH] YEAR]
 
     Print a calendar.
 
diff --git a/toys/posix/cat.c b/toys/posix/cat.c
index a0e2d56b..6daba7a2 100644
--- a/toys/posix/cat.c
+++ b/toys/posix/cat.c
@@ -14,7 +14,7 @@ config CAT
   bool "cat"
   default y
   help
-    usage: cat [-u] [file...]
+    usage: cat [-u] [FILE...]
 
     Copy (concatenate) files to stdout.  If no files listed, copy from stdin.
     Filename "-" is a synonym for stdin.
@@ -37,7 +37,7 @@ config CATV
   bool "catv"
   default y
   help
-    usage: catv [-evt] [filename...]
+    usage: catv [-evt] [FILE...]
 
     Display nonprinting characters as escape sequences. Use M-x for
     high ascii characters (>127), and ^x for other nonprinting chars.
diff --git a/toys/posix/chgrp.c b/toys/posix/chgrp.c
index 8c2e95b4..20a2e0e7 100644
--- a/toys/posix/chgrp.c
+++ b/toys/posix/chgrp.c
@@ -12,7 +12,7 @@ config CHGRP
   bool "chgrp"
   default y
   help
-    usage: chgrp/chown [-RHLP] [-fvh] group file...
+    usage: chgrp/chown [-RHLP] [-fvh] GROUP FILE...
 
     Change group of one or more files.
 
diff --git a/toys/posix/cksum.c b/toys/posix/cksum.c
index ee7c6f54..6e5b915c 100644
--- a/toys/posix/cksum.c
+++ b/toys/posix/cksum.c
@@ -11,7 +11,7 @@ config CKSUM
   bool "cksum"
   default y
   help
-    usage: cksum [-IPLN] [file...]
+    usage: cksum [-IPLN] [FILE...]
 
     For each file, output crc32 checksum value, length and name of file.
     If no files listed, copy from stdin.  Filename "-" is a synonym for stdin.
diff --git a/toys/posix/df.c b/toys/posix/df.c
index a6beda18..a93a762c 100644
--- a/toys/posix/df.c
+++ b/toys/posix/df.c
@@ -10,7 +10,7 @@ config DF
   bool "df"
   default y
   help
-    usage: df [-HPkhi] [-t type] [FILESYSTEM ...]
+    usage: df [-HPkhi] [-t type] [FILE...]
 
     The "disk free" command shows total/used/available disk space for
     each filesystem listed on the command line, or all currently mounted
diff --git a/toys/posix/du.c b/toys/posix/du.c
index 4c3867b2..e7334d1a 100644
--- a/toys/posix/du.c
+++ b/toys/posix/du.c
@@ -12,7 +12,7 @@ config DU
   bool "du"
   default y
   help
-    usage: du [-d N] [-askxHLlmc] [file...]
+    usage: du [-d N] [-askxHLlmc] [FILE...]
 
     Show disk usage, space consumed by files and directories.
 
diff --git a/toys/posix/echo.c b/toys/posix/echo.c
index 70f4ce5e..c78c2c01 100644
--- a/toys/posix/echo.c
+++ b/toys/posix/echo.c
@@ -15,7 +15,7 @@ config ECHO
   bool "echo"
   default y
   help
-    usage: echo [-neE] [args...]
+    usage: echo [-neE] [ARG...]
 
     Write each argument to stdout, with one space between each, followed
     by a newline.
diff --git a/toys/posix/env.c b/toys/posix/env.c
index 19cd18a0..73c8951a 100644
--- a/toys/posix/env.c
+++ b/toys/posix/env.c
@@ -12,7 +12,7 @@ config ENV
   bool "env"
   default y
   help
-    usage: env [-i] [-u NAME] [NAME=VALUE...] [COMMAND [ARG...]]
+    usage: env [-i] [-u NAME] [NAME=VALUE...] [COMMAND...]
 
     Set the environment for command invocation, or list environment variables.
 
diff --git a/toys/posix/file.c b/toys/posix/file.c
index f2cd3af8..4e84e1d4 100644
--- a/toys/posix/file.c
+++ b/toys/posix/file.c
@@ -10,7 +10,7 @@ config FILE
   bool "file"
   default y
   help
-    usage: file [-bhLs] [file...]
+    usage: file [-bhLs] [FILE...]
 
     Examine the given files and describe their content types.
 
diff --git a/toys/posix/head.c b/toys/posix/head.c
index ab8467e4..d5c0700c 100644
--- a/toys/posix/head.c
+++ b/toys/posix/head.c
@@ -12,7 +12,7 @@ config HEAD
   bool "head"
   default y
   help
-    usage: head [-n number] [file...]
+    usage: head [-n NUM] [FILE...]
 
     Copy first lines from files to stdout. If no files listed, copy from
     stdin. Filename "-" is a synonym for stdin.
diff --git a/toys/posix/kill.c b/toys/posix/kill.c
index 3c129b04..27676593 100644
--- a/toys/posix/kill.c
+++ b/toys/posix/kill.c
@@ -18,7 +18,7 @@ config KILL
   bool "kill"
   default y
   help
-    usage: kill [-l [SIGNAL] | -s SIGNAL | -SIGNAL] pid...
+    usage: kill [-l [SIGNAL] | -s SIGNAL | -SIGNAL] PID...
 
     Send signal to process(es).
 
diff --git a/toys/posix/logger.c b/toys/posix/logger.c
index bae07b4d..3bcfb174 100644
--- a/toys/posix/logger.c
+++ b/toys/posix/logger.c
@@ -12,7 +12,7 @@ config LOGGER
   bool "logger"
   default y
   help
-    usage: logger [-s] [-t TAG] [-p [FACILITY.]PRIORITY] [message...]
+    usage: logger [-s] [-t TAG] [-p [FACILITY.]PRIORITY] [MESSAGE...]
 
     Log message (or stdin) to syslog.
 
diff --git a/toys/posix/ls.c b/toys/posix/ls.c
index 9b382590..dda82d40 100644
--- a/toys/posix/ls.c
+++ b/toys/posix/ls.c
@@ -18,7 +18,7 @@ config LS
   bool "ls"
   default y
   help
-    usage: ls [-ACFHLRSZacdfhiklmnpqrstuwx1] [--color[=auto]] [directory...]
+    usage: ls [-ACFHLRSZacdfhiklmnpqrstuwx1] [--color[=auto]] [FILE...]
 
     List files.
 
diff --git a/toys/posix/mkdir.c b/toys/posix/mkdir.c
index 770300d4..932635a6 100644
--- a/toys/posix/mkdir.c
+++ b/toys/posix/mkdir.c
@@ -10,7 +10,7 @@ config MKDIR
   bool "mkdir"
   default y
   help
-    usage: mkdir [-vp] [-m mode] [dirname...]
+    usage: mkdir [-vp] [-m MODE] [DIR...]
 
     Create one or more directories.
 
diff --git a/toys/posix/nice.c b/toys/posix/nice.c
index c26f66d3..1803e611 100644
--- a/toys/posix/nice.c
+++ b/toys/posix/nice.c
@@ -10,7 +10,7 @@ config NICE
   bool "nice"
   default y
   help
-    usage: nice [-n PRIORITY] COMMAND [ARG...]
+    usage: nice [-n PRIORITY] COMMAND...
 
     Run a command line at an increased or decreased scheduling priority.
 
diff --git a/toys/posix/nohup.c b/toys/posix/nohup.c
index e5b526f7..90d374ef 100644
--- a/toys/posix/nohup.c
+++ b/toys/posix/nohup.c
@@ -10,7 +10,7 @@ config NOHUP
   bool "nohup"
   default y
   help
-    usage: nohup COMMAND [ARG...]
+    usage: nohup COMMAND...
 
     Run a command that survives the end of its terminal.
 
diff --git a/toys/posix/patch.c b/toys/posix/patch.c
index 3a708a71..f26e0d70 100644
--- a/toys/posix/patch.c
+++ b/toys/posix/patch.c
@@ -21,7 +21,7 @@ config PATCH
   bool "patch"
   default y
   help
-    usage: patch [-d DIR] [-i PATCH] [-p depth] [-F FUZZ] [-Rlsu] [--dry-run] [FILE [PATCH]]
+    usage: patch [-d DIR] [-i PATCH] [-p DEPTH] [-F FUZZ] [-Rlsu] [--dry-run] [FILE [PATCH]]
 
     Apply a unified diff to one or more files.
 
diff --git a/toys/posix/renice.c b/toys/posix/renice.c
index c1167c8c..4736d4ea 100644
--- a/toys/posix/renice.c
+++ b/toys/posix/renice.c
@@ -10,7 +10,7 @@ config RENICE
   bool "renice"
   default y
   help
-    usage: renice [-gpu] -n increment ID ...
+    usage: renice [-gpu] -n INCREMENT ID...
 */
 
 #define FOR_renice
diff --git a/toys/posix/rmdir.c b/toys/posix/rmdir.c
index d04cf0d9..3bece15f 100644
--- a/toys/posix/rmdir.c
+++ b/toys/posix/rmdir.c
@@ -10,7 +10,7 @@ config RMDIR
   bool "rmdir"
   default y
   help
-    usage: rmdir [-p] [dirname...]
+    usage: rmdir [-p] [DIR...]
 
     Remove one or more directories.
 
diff --git a/toys/posix/tar.c b/toys/posix/tar.c
index b214b44c..1ac9400a 100644
--- a/toys/posix/tar.c
+++ b/toys/posix/tar.c
@@ -23,7 +23,7 @@ config TAR
   bool "tar"
   default y
   help
-    usage: tar [-cxt] [-fvohmjkOS] [-XTCf NAME] [FILES]
+    usage: tar [-cxt] [-fvohmjkOS] [-XTCf NAME] [FILE...]
 
     Create, extract, or list files in a .tar (or compressed t?z) file.
 
diff --git a/toys/posix/tee.c b/toys/posix/tee.c
index ff8a29dc..43529426 100644
--- a/toys/posix/tee.c
+++ b/toys/posix/tee.c
@@ -10,7 +10,7 @@ config TEE
   bool "tee"
   default y
   help
-    usage: tee [-ai] [file...]
+    usage: tee [-ai] [FILE...]
 
     Copy stdin to each listed file, and also to stdout.
     Filename "-" is a synonym for stdout.
diff --git a/toys/posix/time.c b/toys/posix/time.c
index 3d7d2ba7..d99d2db5 100644
--- a/toys/posix/time.c
+++ b/toys/posix/time.c
@@ -11,7 +11,7 @@ config TIME
   default y
   depends on TOYBOX_FLOAT
   help
-    usage: time [-pv] COMMAND [ARGS...]
+    usage: time [-pv] COMMAND...
 
     Run command line and report real, user, and system time elapsed in seconds.
     (real = clock on the wall, user = cpu used by command's code,
diff --git a/toys/posix/uniq.c b/toys/posix/uniq.c
index 0ca01783..3091af72 100644
--- a/toys/posix/uniq.c
+++ b/toys/posix/uniq.c
@@ -10,7 +10,7 @@ config UNIQ
   bool "uniq"
   default y
   help
-    usage: uniq [-cduiz] [-w maxchars] [-f fields] [-s char] [input_file [output_file]]
+    usage: uniq [-cduiz] [-w MAXCHARS] [-f FIELDS] [-s CHAR] [INFILE [OUTFILE]]
 
     Report or filter out repeated lines in a file
 
diff --git a/toys/posix/uuencode.c b/toys/posix/uuencode.c
index 44e38bcb..160954d8 100644
--- a/toys/posix/uuencode.c
+++ b/toys/posix/uuencode.c
@@ -10,9 +10,9 @@ config UUENCODE
   bool "uuencode"
   default y 
   help
-    usage: uuencode [-m] [file] encode-filename
+    usage: uuencode [-m] [INFILE] ENCODE_FILENAME
 
-    Uuencode stdin (or file) to stdout, with encode-filename in the output.
+    Uuencode stdin (or INFILE) to stdout, with ENCODE_FILENAME in the output.
 
     -m	Base64
 */