Fix path/branch extraction stripping every marker occurrence

GitHubPlatform and GitLabPlatform built `path`/`branch` with
str.replace(marker, ""), which removes *every* occurrence of the
marker rather than only the leading one. A URL whose file path or
branch name contained the same segment again was silently corrupted:

    parse('.../blob/main/src/blob/utils.py').path  -> 'main/srcutils.py'
    parse('.../tree/feature/tree/x').branch        -> 'featurex'

The leading marker is already guaranteed by the preceding startswith
check, so slice it off instead. Slicing (rather than str.removeprefix)
keeps the declared Python 3.8 compatibility. Adds regression tests for
nested /blob/ paths and /tree/ branch names on both GitHub and GitLab.

Author: patchwright

changes/PRNUM.bugfix

@@ -0,0 +1 @@
+Fix ``path`` and ``branch`` extraction removing *every* ``/blob/`` and ``/tree/`` occurrence instead of only the leading marker, which corrupted file paths and branch names containing those segments.

giturlparse/platforms/github.py

@@ -34,7 +34,7 @@ class GitHubPlatform(BasePlatform):
     def clean_data(data):
         data = BasePlatform.clean_data(data)
         if data["path_raw"].startswith("/blob/"):
-            data["path"] = data["path_raw"].replace("/blob/", "")
+            data["path"] = data["path_raw"][len("/blob/") :]
         if data["path_raw"].startswith("/tree/"):
-            data["branch"] = data["path_raw"].replace("/tree/", "")
+            data["branch"] = data["path_raw"][len("/tree/") :]
         return data

giturlparse/platforms/gitlab.py

@@ -38,9 +38,9 @@ class GitLabPlatform(BasePlatform):
     def clean_data(data):
         data = BasePlatform.clean_data(data)
         if data["path_raw"].startswith("/blob/"):
-            data["path"] = data["path_raw"].replace("/blob/", "")
+            data["path"] = data["path_raw"][len("/blob/") :]
         if data["path_raw"].startswith("/-/blob/"):
-            data["path"] = data["path_raw"].replace("/-/blob/", "")
+            data["path"] = data["path_raw"][len("/-/blob/") :]
         if data["path_raw"].startswith("/-/tree/"):
-            data["branch"] = data["path_raw"].replace("/-/tree/", "")
+            data["branch"] = data["path_raw"][len("/-/tree/") :]
         return data

giturlparse/tests/test_parse.py

@@ -481,6 +481,80 @@
             },
         ),
     ),
+    (
+        "HTTPS",
+        (
+            # Regression: a file path that itself contains a "blob" directory must
+            # not have the inner "/blob/" stripped (only the leading marker).
+            "https://github.com/nephila/giturlparse/blob/master/giturlparse/blob/data.py",
+            {
+                "host": "github.com",
+                "resource": "github.com",
+                "port": "",
+                "user": "git",
+                "owner": "nephila",
+                "repo": "giturlparse",
+                "name": "giturlparse",
+                "groups": [],
+                "path": "master/giturlparse/blob/data.py",
+                "path_raw": "/blob/master/giturlparse/blob/data.py",
+                "pathname": "/nephila/giturlparse/blob/master/giturlparse/blob/data.py",
+                "branch": "",
+                "protocol": "https",
+                "protocols": ["https"],
+                "platform": "github",
+            },
+        ),
+    ),
+    (
+        "HTTPS",
+        (
+            # Regression: a branch name containing "/tree/" must be preserved
+            # in full rather than having every "/tree/" removed.
+            "https://github.com/nephila/giturlparse/tree/feature/tree/x",
+            {
+                "host": "github.com",
+                "resource": "github.com",
+                "port": "",
+                "user": "git",
+                "owner": "nephila",
+                "repo": "giturlparse",
+                "name": "giturlparse",
+                "groups": [],
+                "path": "",
+                "path_raw": "/tree/feature/tree/x",
+                "pathname": "/nephila/giturlparse/tree/feature/tree/x",
+                "branch": "feature/tree/x",
+                "protocol": "https",
+                "protocols": ["https"],
+                "platform": "github",
+            },
+        ),
+    ),
+    (
+        "HTTPS",
+        (
+            # Regression (GitLab): inner "/blob/" in the file path must survive.
+            "https://gitlab.com/nephila/giturlparse/-/blob/master/giturlparse/blob/data.py",
+            {
+                "host": "gitlab.com",
+                "resource": "gitlab.com",
+                "port": "",
+                "user": "git",
+                "owner": "nephila",
+                "repo": "giturlparse",
+                "name": "giturlparse",
+                "groups": [],
+                "path": "master/giturlparse/blob/data.py",
+                "path_raw": "/-/blob/master/giturlparse/blob/data.py",
+                "pathname": "/nephila/giturlparse/-/blob/master/giturlparse/blob/data.py",
+                "branch": "",
+                "protocol": "https",
+                "protocols": ["https"],
+                "platform": "gitlab",
+            },
+        ),
+    ),
     (
         "HTTPS",
         (