typofix: commit is spelled with two ems

There are a handful of instances where we say commmit when we mean
commit.  Fix them.

Signed-off-by: Junio C Hamano <gitster@pobox.com>

notes-utils.h

@@ -9,7 +9,7 @@
  * Properties of the created commit:
  * - tree: the result of converting t to a tree object with write_notes_tree().
  * - parents: the given parents OR (if NULL) the commit referenced by t->ref.
- * - author/committer: the default determined by commmit_tree().
+ * - author/committer: the default determined by commit_tree().
  * - commit message: msg
  *
  * The resulting commit SHA1 is stored in result_sha1.

t/t3509-cherry-pick-merge-df.sh

@@ -74,7 +74,7 @@ test_expect_success 'Setup rename with file on one side matching different dirna
 	echo content > sub/file &&
 	echo foo > othersub/whatever &&
 	git add -A &&
-	git commit -m "Common commmit" &&
+	git commit -m "Common commit" &&
 
 	git rm -rf othersub &&
 	git mv sub/file othersub &&

t/t6022-merge-rename.sh

@@ -259,7 +259,7 @@ test_expect_success 'setup for rename + d/f conflicts' '
 	printf "1\n2\n3\n4\n5\n6\n7\n8\n9\n10\n" >sub/file &&
 	echo foo >dir/file-in-the-way &&
 	git add -A &&
-	git commit -m "Common commmit" &&
+	git commit -m "Common commit" &&
 
 	echo 11 >>sub/file &&
 	echo more >>dir/file-in-the-way &&
@@ -439,7 +439,7 @@ test_expect_success 'setup both rename source and destination involved in D/F co
 	mkdir one &&
 	echo stuff >one/file &&
 	git add -A &&
-	git commit -m "Common commmit" &&
+	git commit -m "Common commit" &&
 
 	git mv one/file destdir &&
 	git commit -m "Renamed to destdir" &&
@@ -479,7 +479,7 @@ test_expect_success 'setup pair rename to parent of other (D/F conflicts)' '
 	echo stuff >one/file &&
 	echo other >two/file &&
 	git add -A &&
-	git commit -m "Common commmit" &&
+	git commit -m "Common commit" &&
 
 	git rm -rf one &&
 	git mv two/file one &&
@@ -539,7 +539,7 @@ test_expect_success 'setup rename of one file to two, with directories in the wa
 
 	echo stuff >original &&
 	git add -A &&
-	git commit -m "Common commmit" &&
+	git commit -m "Common commit" &&
 
 	mkdir two &&
 	>two/file &&
@@ -583,7 +583,7 @@ test_expect_success 'setup rename one file to two; directories moving out of the
 	mkdir one two &&
 	touch one/file two/file &&
 	git add -A &&
-	git commit -m "Common commmit" &&
+	git commit -m "Common commit" &&
 
 	git rm -rf one &&
 	git mv original one &&
@@ -618,7 +618,7 @@ test_expect_success 'setup avoid unnecessary update, normal rename' '
 
 	printf "1\n2\n3\n4\n5\n6\n7\n8\n9\n10\n" >original &&
 	git add -A &&
-	git commit -m "Common commmit" &&
+	git commit -m "Common commit" &&
 
 	git mv original rename &&
 	echo 11 >>rename &&
@@ -649,7 +649,7 @@ test_expect_success 'setup to test avoiding unnecessary update, with D/F conflic
 	mkdir df &&
 	printf "1\n2\n3\n4\n5\n6\n7\n8\n9\n10\n" >df/file &&
 	git add -A &&
-	git commit -m "Common commmit" &&
+	git commit -m "Common commit" &&
 
 	git mv df/file temp &&
 	rm -rf df &&