build: reformat comments to pass go1.19 vet

See: https://go.dev/doc/go1.19#go-doc

lib/dircache/dircache.go

@@ -192,7 +192,7 @@ func SplitPath(path string) (directory, leaf string) {
 //
 // Path shouldn't start or end with a /
 //
-// If create is set it will make the directory if not found
+// If create is set it will make the directory if not found.
 //
 // It will call FindRoot if it hasn't been called already
 func (dc *DirCache) FindDir(ctx context.Context, path string, create bool) (pathID string, err error) {
@@ -282,7 +282,7 @@ func (dc *DirCache) FindPath(ctx context.Context, path string, create bool) (lea
 // If successful this changes the root of the cache from the true root
 // to the root specified by the path passed into New.
 //
-// Resets the root directory
+// Resets the root directory.
 //
 // If create is set it will make the directory if not found
 func (dc *DirCache) FindRoot(ctx context.Context, create bool) error {
@@ -293,9 +293,9 @@ func (dc *DirCache) FindRoot(ctx context.Context, create bool) error {
 
 // _findRoot finds the root directory if not already found
 //
-// Resets the root directory
+// Resets the root directory.
 //
-// If create is set it will make the directory if not found
+// If create is set it will make the directory if not found.
 //
 // Call with mu held
 func (dc *DirCache) _findRoot(ctx context.Context, create bool) error {
@@ -390,7 +390,7 @@ func (dc *DirCache) ResetRoot() {
 // It does all the checking, creates intermediate directories and
 // returns leafs and IDs ready for the move.
 //
-// This returns
+// This returns:
 //
 // - srcID - ID of the source directory
 // - srcDirectoryID - ID of the parent of the source directory