patch 9.0.1285: various small problems

Problem:    Various small problems.
Solution:   Adjust white space and comments.
diff --git a/src/getchar.c b/src/getchar.c
index 2d30d4f..2f0079d 100644
--- a/src/getchar.c
+++ b/src/getchar.c
@@ -1662,7 +1662,7 @@
 	    && c >= 0 && c <= 127)
     {
 	c += 0x80;
-	*modifiers &= ~(MOD_MASK_META|MOD_MASK_ALT);
+	*modifiers &= ~(MOD_MASK_META | MOD_MASK_ALT);
     }
     return c;
 }