Fix misc typos in comments.

Spotted mostly by Fabien Coelho.

Discussion: https://www.postgresql.org/message-id/alpine.DEB.2.21.1901230947050.16643@lancre

contrib/pgcrypto/pgp-decrypt.c

@@ -132,7 +132,7 @@ pgp_parse_pkt_hdr(PullFilter *src, uint8 *tag, int *len_p, int allow_ctx)
 	int			res;
 	uint8	   *p;
 
-	/* EOF is normal here, thus we dont use GETBYTE */
+	/* EOF is normal here, thus we don't use GETBYTE */
 	res = pullf_read(src, 1, &p);
 	if (res < 0)
 		return res;

src/backend/access/gin/ginget.c

@@ -442,7 +442,7 @@ restartScanEntry:
 			/*
 			 * Lock the entry leaf page.  This is more coarse-grained than
 			 * necessary, because it will conflict with any insertions that
-			 * land on the same leaf page, not only the exacty key we searched
+			 * land on the same leaf page, not only the exact key we searched
 			 * for.  But locking an individual tuple would require updating
 			 * that lock whenever it moves because of insertions or vacuums,
 			 * which seems too complicated.

src/backend/executor/execParallel.c

@@ -1050,7 +1050,7 @@ ExecParallelRetrieveJitInstrumentation(PlanState *planstate,
 			MemoryContextAllocZero(planstate->state->es_query_cxt, sizeof(JitInstrumentation));
 	combined = planstate->state->es_jit_worker_instr;
 
-	/* Accummulate all the workers' instrumentations. */
+	/* Accumulate all the workers' instrumentations. */
 	for (n = 0; n < shared_jit->num_workers; ++n)
 		InstrJitAgg(combined, &shared_jit->jit_instr[n]);
 

src/backend/utils/cache/typcache.c

@@ -150,7 +150,7 @@ typedef struct RecordCacheEntry
 
 /*
  * To deal with non-anonymous record types that are exchanged by backends
- * involved in a parallel query, we also need a shared verion of the above.
+ * involved in a parallel query, we also need a shared version of the above.
  */
 struct SharedRecordTypmodRegistry
 {

src/bin/pgbench/pgbench.c

@@ -353,12 +353,12 @@ typedef struct
 } CState;
 
 /*
- * Cache cell for zipfian_random call
+ * Cache cell for random_zipfian call
  */
 typedef struct
 {
 	/* cell keys */
-	double		s;				/* s - parameter of zipfan_random function */
+	double		s;				/* s - parameter of random_zipfian function */
 	int64		n;				/* number of elements in range (max - min + 1) */
 
 	double		harmonicn;		/* generalizedHarmonicNumber(n, s) */

src/include/nodes/execnodes.h

@@ -1078,7 +1078,7 @@ typedef struct ModifyTableState
  *		nplans				how many plans are in the array
  *		whichplan			which plan is being executed (0 .. n-1), or a
  *							special negative value. See nodeAppend.c.
- *		pruningstate		details required to allow partitions to be
+ *		prune_state			details required to allow partitions to be
  *							eliminated from the scan, or NULL if not possible.
  *		valid_subplans		for runtime pruning, valid appendplans indexes to
  *							scan.

src/include/port.h

@@ -462,7 +462,7 @@ extern pqsigfunc pqsignal_no_restart(int signo, pqsigfunc func);
 /* port/quotes.c */
 extern char *escape_single_quotes_ascii(const char *src);
 
-/* port/wait_error.c */
+/* common/wait_error.c */
 extern char *wait_result_to_str(int exit_status);
 extern bool wait_result_is_signal(int exit_status, int signum);
 extern bool wait_result_is_any_signal(int exit_status, bool include_command_not_found);

src/pl/plpython/plpy_elog.c

@@ -242,7 +242,7 @@ PLy_traceback(PyObject *e, PyObject *v, PyObject *tb,
 
 	*tb_depth = 0;
 	initStringInfo(&tbstr);
-	/* Mimick Python traceback reporting as close as possible. */
+	/* Mimic Python traceback reporting as close as possible. */
 	appendStringInfoString(&tbstr, "Traceback (most recent call last):");
 	while (tb != NULL && tb != Py_None)
 	{