[patch] expr.c: Fix formatting.

[Kazu Hirata]

Hi,

Now, how is this?  I am showing only relevant parts.  I hope this is
OK.

Thanks,

Kazu Hirata

-  /* input_line_pointer->*/
-  /* floating-point constant. */
+  /* INPUT_LINE_POINTER ->  */
+  /* floating-point constant.  */
...
-  /* input_line_pointer->just after constant, */
-  /* which may point to whitespace. */
+  /* INPUT_LINE_POINTER -> just after constant,  */
+  /* which may point to whitespace.  */
...
-  /* c contains character after number. */
-  /* input_line_pointer->char after c. */
+  /* C is character after number.  */
+  /* INPUT_LINE_POINTER -> char after c.  */
...
-      /* Again, c is char after number, input_line_pointer->after c. */
+      /* Again, C is char after number, INPUT_LINE_POINTER -> after c.  */
...
-      /* again, c is char after number, */
-      /* input_line_pointer->after c. */
+      /* Again, C is char after number,  */
+      /* INPUT_LINE_POINTER -> after c.  */