More examples. Fixes #23.

Examples are not in the README, but I'd rather avoid duplicating
stuff, hence keep everything in the script.

Makefile

@@ -40,6 +40,7 @@ git-latexdiff.txt: git-latexdiff git-latexdiff.txt.header
 	( cat git-latexdiff.txt.header ; \
 	  printf '%s\n' ------------ ; \
 	  ./git-latexdiff --help ; \
+	  echo ; \
 	  ./git-latexdiff --help-examples ; \
 	  printf '%s\n' ------------ ) > $@
 

git-latexdiff

@@ -148,6 +148,18 @@ examples () {
     cat <<EOF
 Examples:
 
+Diff the previous revision with the latest commit:
+
+    git latexdiff HEAD^
+
+Diff the latest commit with the working tree:
+
+    git latexdiff HEAD --
+
+Diff latest commit with branch master:
+
+    git latexdiff master HEAD
+
 Pass --type=CHANGEBAR to latexdiff to get changebars in the margins
 instead of red+trike/blue+underline diff: