Rollup merge of #132522 - senekor:consistenst-codegen-help, r=compiler-errors

make codegen help output more consistent

The output of `rustc -C help` generally has one option per line. There was one exception because of a (presumably) forgotten line continuation escape.

Author: matthiaskrgr

compiler/rustc_session/src/options.rs

@@ -1585,7 +1585,7 @@ options! {
     link_dead_code: Option<bool> = (None, parse_opt_bool, [TRACKED],
         "keep dead code at link time (useful for code coverage) (default: no)"),
     link_self_contained: LinkSelfContained = (LinkSelfContained::default(), parse_link_self_contained, [UNTRACKED],
-        "control whether to link Rust provided C objects/libraries or rely
+        "control whether to link Rust provided C objects/libraries or rely \
         on a C toolchain or linker installed in the system"),
     linker: Option<PathBuf> = (None, parse_opt_pathbuf, [UNTRACKED],
         "system linker to link outputs with"),