[NFC][compiler-rt] Add missing space in libfuzzer -help docs

GitOrigin-RevId: 52526065bc808e52d0803b28aa24c0bb7ae70d87
diff --git a/FuzzerFlags.def b/FuzzerFlags.def
index 1181534..fc3b3aa 100644
--- a/FuzzerFlags.def
+++ b/FuzzerFlags.def
@@ -167,7 +167,7 @@
     "purge_allocator_interval=-1 to disable this functionality.")
 FUZZER_FLAG_INT(trace_malloc, 0, "If >= 1 will print all mallocs/frees. "
     "If >= 2 will also print stack traces.")
-FUZZER_FLAG_INT(rss_limit_mb, 2048, "If non-zero, the fuzzer will exit upon"
+FUZZER_FLAG_INT(rss_limit_mb, 2048, "If non-zero, the fuzzer will exit upon "
     "reaching this limit of RSS memory usage.")
 FUZZER_FLAG_INT(malloc_limit_mb, 0, "If non-zero, the fuzzer will exit "
     "if the target tries to allocate this number of Mb with one malloc call. "