doc: commit: unify <pathspec> description

Synchronize it to `git add`, which has a pretty good description.
This also better disambiguates <file>... header.

Signed-off-by: Alexandr Miloslavskiy <[email protected]>

Author: SyntevoAlex

Documentation/git-commit.txt

@@ -13,7 +13,7 @@ SYNOPSIS
 	   [-F <file> | -m <msg>] [--reset-author] [--allow-empty]
 	   [--allow-empty-message] [--no-verify] [-e] [--author=<author>]
 	   [--date=<date>] [--cleanup=<mode>] [--[no-]status]
-	   [-i | -o] [-S[<keyid>]] [--] [<file>...]
+	   [-i | -o] [-S[<keyid>]] [--] [<pathspec>...]
 
 DESCRIPTION
 -----------
@@ -345,12 +345,14 @@ changes to tracked files.
 \--::
 	Do not interpret any more arguments as options.
 
-<file>...::
-	When files are given on the command line, the command
-	commits the contents of the named files, without
-	recording the changes already staged.  The contents of
-	these files are also staged for the next commit on top
-	of what have been staged before.
+<pathspec>...::
+	When pathspec is given on the command line, commit the contents of
+	the files that match the pathspec without recording the changes
+	already added to the index. The contents of these files are also
+	staged for the next commit on top of what have been staged before.
++
+For more details about the <pathspec> syntax, see the 'pathspec' entry
+in linkgit:gitglossary[7].
 
 :git-commit: 1
 include::date-formats.txt[]