patchgitcli: tweak "man gitcli" for clarity

diff --git a/Documentation/gitcli.txt b/Documentation/gitcli.txt
index 9f13266a6..a4efcb7ce 100644
--- a/Documentation/gitcli.txt
+++ b/Documentation/gitcli.txt
@@ -13,7 +13,7 @@ gitcli
 DESCRIPTION
 -----------

-This manual describes the convention used throughout Git CLI.
+This manual describes the common conventions used throughout Git CLI.

 Many commands take revisions (most often "commits", but sometimes
 "tree-ish", depending on the context and command) and paths as their
@@ -32,32 +32,35 @@ arguments.  Here are the rules:
    between the HEAD commit and the work tree as a whole".  You can say
    `git diff HEAD --` to ask for the latter.

- * Without disambiguating `--`, Git makes a reasonable guess, but errors
-   out and asking you to disambiguate when ambiguous.  E.g. if you have a
+ * Without a disambiguating `--`, Git makes a reasonable guess, but can
+   error out, asking you to disambiguate when ambiguous.  E.g. if you have a
    file called HEAD in your work tree, `git diff HEAD` is ambiguous, and
    you have to say either `git diff HEAD --` or `git diff -- HEAD` to
    disambiguate.
 +
 When writing a script that is expected to handle random user-input, it is
 a good practice to make it explicit which arguments are which by placing
-disambiguating `--` at appropriate places.
+a disambiguating `--` at appropriate places.

  * Many commands allow wildcards in paths, but you need to protect
-   them from getting globbed by the shell.  These two mean different
-   things:
+   them from getting globbed by the shell.  The following commands have
+   two different meanings:
 +
 --------------------------------
 $ git checkout -- *.c
+
 $ git checkout -- \*.c
+$ git checkout -- "*.c"
+$ git checkout -- '*.c'
 --------------------------------
 +
-The former lets your shell expand the fileglob, and you are asking
-the dot-C files in your working tree to be overwritten with the version
-in the index.  The latter passes the `*.c` to Git, and you are asking
-the paths in the index that match the pattern to be checked out to your
-working tree.  After running `git add hello.c; rm hello.c`, you will _not_
-see `hello.c` in your working tree with the former, but with the latter
-you will.
+The first command lets your shell expand the fileglob, and you are asking
+the dot-C files in your working tree to be overwritten with the version in
+the index.  The latter three variations pass the `*.c` to Git, and you are
+asking the paths in the index that match the pattern to be checked out to
+your working tree.  After running `git add hello.c; rm hello.c`, you will
+_not_ see `hello.c` in your working tree with the first command, but with
+the latter three variations, you will.

  * Just as the filesystem '.' (period) refers to the current directory,
    using a '.' as a repository name in Git (a dot-repository) is a relative