[fragile] Only remove whitespace for subset of dtypes

Author: buggi22

pandas/formats/format.py

@@ -604,7 +604,10 @@ def to_string(self):
                 self._chk_truncate()
                 strcols = self._to_str_columns()
                 text = self.adj.adjoin(1, *strcols)
-        if not self.index:
+
+        first_column_dtype = (None if len(frame.columns) == 0
+            else frame.dtypes[frame.columns[0]])
+        if not self.index and first_column_dtype.kind != 'O':
             # Remove a single space from the beginning of each line
             # and remove any trailing spaces
             if len(text) > 0 and text[0] == ' ':