Preventive maintenance in advance of pgindent run.

Reformat various places in which pgindent will make a mess, and
fix a few small violations of coding style that I happened to notice
while perusing the diffs from a pgindent dry run.

There is one actual bug fix here: the need-to-enlarge-the-buffer code
path in icu_convert_case was obviously broken.  Perhaps it's unreachable
in our usage?  Or maybe this is just sadly undertested.

src/common/scram-common.c

@@ -213,9 +213,10 @@ scram_build_verifier(const char *salt, int saltlen, int iterations,
 
 	scram_ServerKey(salted_password, server_key);
 
-	/*
+	/*----------
 	 * The format is:
 	 * SCRAM-SHA-256$<iteration count>:<salt>$<StoredKey>:<ServerKey>
+	 *----------
 	 */
 	maxlen = strlen("SCRAM-SHA-256") + 1
 		+ 10 + 1								/* iteration count */