Fix minor mistakes in documentation.

Fixes <http://bugs.gnu.org/15487>.
Reported by Josep Portella Florit <jpf@primfilat.com>.

* doc/ref/api-i18n.texi (i18n Introduction, Text Collation,
  Internationalization, Internationalization):
  LC_MESSAGE --> LC_MESSAGES.

* doc/ref/api-procedures.texi (Compiled Procedures):
  program-lambda-alist --> program-lambda-list.

* THANKS: Fix alignment of Josep Portella Florit.

THANKS

@@ -74,7 +74,7 @@ For fixes or providing information which led to a fix:
           David Fang
           Barry Fishman
        Kevin J. Fletcher
- Josep Portella Florit
+          Josep Portella Florit
         Charles Gagnon
              Fu-gangqiang
           Aidan Gauland

doc/ref/api-i18n.texi

@@ -88,7 +88,7 @@ default @code{C} locale which usually represents conventions in use in
 the USA):
 
 @example
-(make-locale (list LC_MESSAGE LC_CTYPE) "sv_SE")
+(make-locale (list LC_MESSAGES LC_CTYPE) "sv_SE")
 @end example
 
 The following example combines the use of Esperanto messages and

doc/ref/api-procedures.texi

@@ -297,7 +297,7 @@ list, or @code{#f} if this information is not available.
 For example:
 
 @example
-(program-lambda-alist
+(program-lambda-list
  (lambda* (a b #:optional c #:key (d 1) #:rest e)
    #t)) @result{}
 @end example