Code simplification

Simplified some code and calls, less `setq-local` delegated to `let*`

funcs.el

@@ -73,10 +73,9 @@ table"
 none the word the cursor is over"
   (interactive)
   (let* ((beg (region-beginning))
-         (end (region-end))
-         (boundary-word (bounds-of-thing-at-point 'word)))
+         (end (region-end)))
     (if (= beg end)
-        boundary-word
+        (bounds-of-thing-at-point 'word)
       (cons beg end))))
 
 (defun conlanging//replace-char-by-table (t-correspondance-table)
@@ -87,12 +86,10 @@ second element of the pair the string it has to be replaced
 with."
   (let* ((cur-boundary (conlanging//get-boundary))
          (beg (car cur-boundary))
-         (end (cdr cur-boundary)))
-    (setq-local regionp
-                (buffer-substring-no-properties beg end))
-    (setq-local regionp
-                (conlanging//replace-string-by-char regionp
-                                                    t-correspondance-table))
+         (end (cdr cur-boundary))
+         (regionp (buffer-substring-no-properties beg end))
+         (new-regionp (conlanging//replace-string-by-char regionp
+                                                          t-correspondance-table)))
     (delete-region beg end)
     (goto-char beg)
     (insert regionp)))