use root-relative paths

crates/ra_analysis/tests/tests.rs

@@ -81,7 +81,7 @@ fn test_unresolved_module_diagnostic() {
             fix: Some(SourceChange {
                 label: "create module",
                 source_file_edits: [],
-                file_system_edits: [CreateFile { anchor: FileId(1), path: "../foo.rs" }],
+                file_system_edits: [CreateFile { source_root: SourceRootId(0), path: "foo.rs" }],
                 cursor_position: None }) }]"#,
         &diagnostics,
     );

crates/ra_hir/src/module/imp.rs

@@ -4,7 +4,7 @@ use ra_syntax::{
     ast::{self, NameOwner},
     SmolStr,
 };
-use relative_path::{RelativePathBuf, RelativePath};
+use relative_path::RelativePathBuf;
 use rustc_hash::{FxHashMap, FxHashSet};
 use arrayvec::ArrayVec;
 use ra_db::{SourceRoot, SourceRootId, Cancelable, FileId};
@@ -184,11 +184,7 @@ fn resolve_submodule(
         .collect::<Vec<_>>();
     let problem = if points_to.is_empty() {
         Some(Problem::UnresolvedModule {
-            candidate: RelativePath::new("../").join(&if is_dir_owner {
-                file_mod
-            } else {
-                file_dir_mod
-            }),
+            candidate: if is_dir_owner { file_mod } else { file_dir_mod },
         })
     } else {
         None