eolian: generate correct fallback character

src/bin/eolian/docs_generator.c

@@ -52,7 +52,7 @@ _append_section(const char *desc, int ind, int curl, Eina_Strbuf *buf,
              if (isalpha(*desc))
                eina_strbuf_append(wbuf, "@c ");
              else
-               eina_strbuf_append_char(wbuf, '@');
+               eina_strbuf_append_char(wbuf, '$');
           }
         while (*desc && !isspace(*desc))
           eina_strbuf_append_char(wbuf, *desc++);

src/tests/eolian/data/struct.eo

@@ -17,7 +17,7 @@ struct @extern Not.Generated {
 class Struct {
    methods {
       foo {
-         [[Foo docs. This is $monospace.]]
+         [[Foo docs. This is $monospace. This is alone-standing $.]]
          params {
             idx: int;
          }

src/tests/eolian/data/struct_ref.c

@@ -31,7 +31,7 @@ typedef struct _Opaque Opaque;
 EAPI const Eo_Class *struct_class_get(void) EINA_CONST;
 
 /**
- * @brief Foo docs. This is @c monospace.
+ * @brief Foo docs. This is @c monospace. This is alone-standing $.
  *
  * @param[in] idx
  */