Remove double spaces after dots in comments

compiler/rustc_session/src/config.rs

@@ -715,7 +715,7 @@ impl OutputFilenames {
 pub fn host_triple() -> &'static str {
     // Get the host triple out of the build environment. This ensures that our
     // idea of the host triple is the same as for the set of libraries we've
-    // actually built.  We can't just take LLVM's host triple because they
+    // actually built. We can't just take LLVM's host triple because they
     // normalize all ix86 architectures to i386.
     //
     // Instead of grabbing the host triple (for the current host), we grab (at
@@ -1271,7 +1271,7 @@ impl RustcOptGroup {
 
 // The `opt` local module holds wrappers around the `getopts` API that
 // adds extra rustc-specific metadata to each option; such metadata
-// is exposed by .  The public
+// is exposed by . The public
 // functions below ending with `_u` are the functions that return
 // *unstable* options, i.e., options that are only enabled when the
 // user also passes the `-Z unstable-options` debugging flag.

compiler/rustc_session/src/cstore.rs

@@ -228,7 +228,7 @@ pub trait CrateStore: std::fmt::Debug {
     fn def_path_hash(&self, def: DefId) -> DefPathHash;
 
     // This information is safe to access, since it's hashed as part of the StableCrateId, which
-    // incr.  comp. uses to identify a CrateNum.
+    // incr. comp. uses to identify a CrateNum.
     fn crate_name(&self, cnum: CrateNum) -> Symbol;
     fn stable_crate_id(&self, cnum: CrateNum) -> StableCrateId;
     fn stable_crate_id_to_crate_num(&self, stable_crate_id: StableCrateId) -> CrateNum;

compiler/rustc_session/src/filesearch.rs

@@ -155,7 +155,7 @@ pub fn sysroot_candidates() -> SmallVec<[PathBuf; 2]> {
 /// This function checks if sysroot is found using env::args().next(), and if it
 /// is not found, finds sysroot from current rustc_driver dll.
 pub fn get_or_default_sysroot() -> Result<PathBuf, String> {
-    // Follow symlinks.  If the resolved path is relative, make it absolute.
+    // Follow symlinks. If the resolved path is relative, make it absolute.
     fn canonicalize(path: PathBuf) -> PathBuf {
         let path = fs::canonicalize(&path).unwrap_or(path);
         // See comments on this target function, but the gist is that

compiler/rustc_session/src/output.rs

@@ -29,9 +29,9 @@ pub fn out_filename(
     out_filename
 }
 
-/// Make sure files are writeable.  Mac, FreeBSD, and Windows system linkers
+/// Make sure files are writeable. Mac, FreeBSD, and Windows system linkers
 /// check this already -- however, the Linux linker will happily overwrite a
-/// read-only file.  We should be consistent.
+/// read-only file. We should be consistent.
 pub fn check_file_is_writeable(file: &Path, sess: &Session) {
     if !is_writeable(file) {
         sess.emit_fatal(FileIsNotWriteable { file });

compiler/rustc_session/src/session.rs

@@ -197,7 +197,7 @@ pub struct Session {
     pub ctfe_backtrace: Lock<CtfeBacktrace>,
 
     /// This tracks where `-Zunleash-the-miri-inside-of-you` was used to get around a
-    /// const check, optionally with the relevant feature gate.  We use this to
+    /// const check, optionally with the relevant feature gate. We use this to
     /// warn about unleashing, but with a single diagnostic instead of dozens that
     /// drown everything else in noise.
     miri_unleashed_features: Lock<Vec<(Span, Option<Symbol>)>>,