This happened because of false @c's in macro lines.
* /doc/misc/cc-mode.texi (Line-up Functions): Remove the unneeded @c from
macros sssTBasicOffset, sssTsssTBasicOffset, and hereFn.
@end ifinfo
@macro sssTBasicOffset
-<--> @i{c-basic-offset}@c
+<--> @i{c-basic-offset}
@end macro
@macro sssTsssTBasicOffset
-<--><--> @i{c-basic-offset}@c
+<--><--> @i{c-basic-offset}
@end macro
@macro hereFn{func}
-<- @i{\func\}@c
+<- @i{\func\}
@end macro
@c The TeX backend seems to insert extra spaces around the argument. :P