diff --git a/builtin/bisect--helper.c b/builtin/bisect--helper.c
index 626de92098..8b2b259ff0 100644
--- a/builtin/bisect--helper.c
+++ b/builtin/bisect--helper.c
@@ -1270,7 +1270,7 @@ int cmd_bisect__helper(int argc, const char **argv, const char *prefix)
 		OPT_CMDMODE(0, "bisect-visualize", &cmdmode,
 			 N_("visualize the bisection"), BISECT_VISUALIZE),
 		OPT_CMDMODE(0, "bisect-run", &cmdmode,
-			 N_("use <cmd>... to automatically bisect."), BISECT_RUN),
+			 N_("use <cmd>... to automatically bisect"), BISECT_RUN),
 		OPT_BOOL(0, "no-log", &nolog,
 			 N_("no log for BISECT_WRITE")),
 		OPT_END()
diff --git a/builtin/reflog.c b/builtin/reflog.c
index c8f2b31873..016466852f 100644
--- a/builtin/reflog.c
+++ b/builtin/reflog.c
@@ -600,7 +600,7 @@ static int cmd_reflog_expire(int argc, const char **argv, const char *prefix)
 		OPT_BIT(0, "updateref", &flags,
 			N_("update the reference to the value of the top reflog entry"),
 			EXPIRE_REFLOGS_UPDATE_REF),
-		OPT_BOOL(0, "verbose", &verbose, N_("print extra information on screen.")),
+		OPT_BOOL(0, "verbose", &verbose, N_("print extra information on screen")),
 		OPT_CALLBACK_F(0, "expire", &cmd, N_("timestamp"),
 			       N_("prune entries older than the specified time"),
 			       PARSE_OPT_NONEG,
@@ -613,7 +613,7 @@ static int cmd_reflog_expire(int argc, const char **argv, const char *prefix)
 			 N_("prune any reflog entries that point to broken commits")),
 		OPT_BOOL(0, "all", &do_all, N_("process the reflogs of all references")),
 		OPT_BOOL(1, "single-worktree", &all_worktrees,
-			 N_("limits processing to reflogs from the current worktree only.")),
+			 N_("limits processing to reflogs from the current worktree only")),
 		OPT_END()
 	};
 
@@ -736,7 +736,7 @@ static int cmd_reflog_delete(int argc, const char **argv, const char *prefix)
 		OPT_BIT(0, "updateref", &flags,
 			N_("update the reference to the value of the top reflog entry"),
 			EXPIRE_REFLOGS_UPDATE_REF),
-		OPT_BOOL(0, "verbose", &verbose, N_("print extra information on screen.")),
+		OPT_BOOL(0, "verbose", &verbose, N_("print extra information on screen")),
 		OPT_END()
 	};
 
diff --git a/builtin/submodule--helper.c b/builtin/submodule--helper.c
index eeacefcc38..d8638434dc 100644
--- a/builtin/submodule--helper.c
+++ b/builtin/submodule--helper.c
@@ -1882,7 +1882,7 @@ static int module_clone(int argc, const char **argv, const char *prefix)
 		OPT_STRING(0, "depth", &clone_data.depth,
 			   N_("string"),
 			   N_("depth for shallow clones")),
-		OPT__QUIET(&quiet, "Suppress output for cloning a submodule"),
+		OPT__QUIET(&quiet, "suppress output for cloning a submodule"),
 		OPT_BOOL(0, "progress", &progress,
 			   N_("force cloning progress")),
 		OPT_BOOL(0, "require-init", &require_init,
diff --git a/diff.c b/diff.c
index c4ccb6b1a3..2bd5e0d817 100644
--- a/diff.c
+++ b/diff.c
@@ -5630,7 +5630,7 @@ static void prep_parse_options(struct diff_options *options)
 			       N_("select files by diff type"),
 			       PARSE_OPT_NONEG, diff_opt_diff_filter),
 		{ OPTION_CALLBACK, 0, "output", options, N_("<file>"),
-		  N_("Output to a specific file"),
+		  N_("output to a specific file"),
 		  PARSE_OPT_NONEG, NULL, 0, diff_opt_output },
 
 		OPT_END()
diff --git a/t/helper/test-run-command.c b/t/helper/test-run-command.c
index 913775a14b..8f370cd89f 100644
--- a/t/helper/test-run-command.c
+++ b/t/helper/test-run-command.c
@@ -221,9 +221,9 @@ static int quote_stress_test(int argc, const char **argv)
 	struct strbuf out = STRBUF_INIT;
 	struct strvec args = STRVEC_INIT;
 	struct option options[] = {
-		OPT_INTEGER('n', "trials", &trials, "Number of trials"),
-		OPT_INTEGER('s', "skip", &skip, "Skip <n> trials"),
-		OPT_BOOL('m', "msys2", &msys2, "Test quoting for MSYS2's sh"),
+		OPT_INTEGER('n', "trials", &trials, "number of trials"),
+		OPT_INTEGER('s', "skip", &skip, "skip <n> trials"),
+		OPT_BOOL('m', "msys2", &msys2, "test quoting for MSYS2's sh"),
 		OPT_END()
 	};
 	const char * const usage[] = {