Fix invalid backslash characters

* https://docs.python.org/3/whatsnew/3.6.html#deprecated-python-behavior

Signed-off-by: Alfred Wingate <parona@protonmail.com>

src/euscan/handlers/generic.py

@@ -122,7 +122,7 @@ def scan_directory_recursive(cp, ver, rev, url, steps, orig_url, options):
 
     results = []
 
-    if re.search(b"<\s*a\s+[^>]*href", data, re.I):
+    if re.search(rb"<\s*a\s+[^>]*href", data, re.I):
         results.extend(scan_html(data, url, pattern))
     elif url.startswith("ftp://"):
         results.extend(scan_ftp(data, url, pattern))

src/euscan/handlers/php.py

@@ -20,7 +20,7 @@ def can_handle(pkg, url=None):
 
 
 def guess_package_and_channel(cp, url):
-    match = re.search("http://(.*)\.php\.net/get/(.*)-(.*).tgz", url)
+    match = re.search(r"http://(.*)\.php\.net/get/(.*)-(.*).tgz", url)
 
     if match:
         host = match.group(1)

src/euscan/handlers/pypi.py

@@ -19,7 +19,7 @@ def can_handle(pkg, url=None):
 
 
 def guess_package(cp, url):
-    match = re.search("mirror://pypi/\w+/(.*)/.*", url)
+    match = re.search(r"mirror://pypi/\w+/(.*)/.*", url)
     if match:
         return match.group(1)
 

src/euscan/handlers/url.py

@@ -24,7 +24,7 @@ def can_handle(*args):
 
 
 def handle_directory_patterns(base, file_pattern):
-    """
+    r"""
     Directory pattern matching
     e.g.: base: ftp://ftp.nessus.org/pub/nessus/nessus-([\d\.]+)/src/
           file_pattern: nessus-core-([\d\.]+)\.tar\.gz