tweaks: rename three variables, to follow the general scheme

Also rewrap a line, reshuffle two others, and remove two redundant
comments.

src/cut.c

@@ -263,8 +263,7 @@ void extract_segment(linestruct *top, size_t top_x, linestruct *bot, size_t bot_
 	if (top == bot) {
 		taken = make_new_node(NULL);
 		taken->data = measured_copy(top->data + top_x, bot_x - top_x);
-		memmove(top->data + top_x, top->data + bot_x,
+		memmove(top->data + top_x, top->data + bot_x, strlen(top->data + bot_x) + 1);
-										strlen(top->data + bot_x) + 1);
 		last = taken;
 	} else if (top_x == 0 && bot_x == 0) {
 		taken = top;
@@ -695,15 +694,13 @@ void copy_text(void)
 /* Copy text from the cutbuffer into the current buffer. */
 void paste_text(void)
 {
-	/* Remember where the paste started. */
 #ifndef NANO_TINY
+	/* Remember where the paste started. */
 	linestruct *was_current = openfile->current;
 	bool had_anchor = was_current->has_anchor;
 #endif
 	ssize_t was_lineno = openfile->current->lineno;
-		/* The line number where we started the paste. */
 	size_t was_leftedge = 0;
-		/* The leftedge where we started the paste. */
 
 	if (cutbuffer == NULL) {
 		statusline(AHEM, _("Cutbuffer is empty"));
@@ -722,7 +719,7 @@ void paste_text(void)
 	copy_from_buffer(cutbuffer);
 
 #ifndef NANO_TINY
-	/* Wipe any anchors in the pasted text, so that they don't move around. */
+	/* Wipe any anchors in the pasted text, so that they don't proliferate. */
 	for (linestruct *line = was_current; line != openfile->current->next; line = line->next)
 		line->has_anchor = FALSE;
 

src/files.c

@@ -973,10 +973,10 @@ bool execute_command(const char *command)
 {
 	int from_fd[2], to_fd[2];
 		/* The pipes through which text will be written and read. */
-	const bool should_pipe = (command[0] == '|');
-	FILE *stream;
 	struct sigaction oldaction, newaction = {{0}};
 		/* Original and temporary handlers for SIGINT. */
+	const bool should_pipe = (command[0] == '|');
+	FILE *stream;
 
 	/* Create a pipe to read the command's output from, and, if needed,
 	 * a pipe to feed the command's input through. */

src/text.c

@@ -2061,9 +2061,9 @@ bool replace_buffer(const char *filename, undo_type action, const char *operatio
 /* Execute the given program, with the given temp file as last argument. */
 void treat(char *tempfile_name, char *theprogram, bool spelling)
 {
-	ssize_t lineno_save = openfile->current->lineno;
+	ssize_t was_lineno = openfile->current->lineno;
-	size_t current_x_save = openfile->current_x;
+	size_t was_pww = openfile->placewewant;
-	size_t pww_save = openfile->placewewant;
+	size_t was_x = openfile->current_x;
 	bool was_at_eol = (openfile->current->data[openfile->current_x] == '\0');
 	struct stat fileinfo;
 	long timestamp_sec = 0;
@@ -2147,7 +2147,7 @@ void treat(char *tempfile_name, char *theprogram, bool spelling)
 		/* Adjust the end point of the marked region for any change in
 		 * length of the region's last line. */
 		if (upright)
-			current_x_save = openfile->current_x;
+			was_x = openfile->current_x;
 		else
 			openfile->mark_x = openfile->current_x;
 
@@ -2165,7 +2165,7 @@ void treat(char *tempfile_name, char *theprogram, bool spelling)
 	}
 
 	/* Go back to the old position. */
-	goto_line_posx(lineno_save, current_x_save);
+	goto_line_posx(was_lineno, was_x);
 	if (was_at_eol || openfile->current_x > strlen(openfile->current->data))
 		openfile->current_x = strlen(openfile->current->data);
 
@@ -2176,7 +2176,7 @@ void treat(char *tempfile_name, char *theprogram, bool spelling)
 #endif
 	}
 
-	openfile->placewewant = pww_save;
+	openfile->placewewant = was_pww;
 	adjust_viewport(STATIONARY);
 
 	if (spelling)