fix tests on Blob

Author: alexandresalome

src/Gitonomy/Git/Blob.php

@@ -103,6 +103,6 @@ public function isBinary()
      */
     public function isText()
     {
-        return preg_match('#^text/|^application/xml#', $this->getMimetype());
+        return (bool) preg_match('#^text/|^application/xml#', $this->getMimetype());
     }
 }

tests/Gitonomy/Git/Tests/BlobTest.php

@@ -41,12 +41,12 @@ public function testGetMimetype()
     public function testIsText()
     {
         $blob = $this->getLibRepository()->getBlob(self::README_BLOB);
-        $this->asserTrue($blob->isText());
+        $this->assertTrue($blob->isText());
     }
 
     public function testIsBinary()
     {
         $blob = $this->getLibRepository()->getBlob(self::README_BLOB);
-        $this->asserFalse($blob->isBinary());
+        $this->assertFalse($blob->isBinary());
     }
 }