support/scripts/pkg-stats: fix flake8 errors

Fixes flake8 errors:
support/scripts/pkg-stats:1013:133: E501 line too long (164 > 132 characters)
support/scripts/pkg-stats:1018:36: F541 f-string is missing placeholders
support/scripts/pkg-stats:1110:199: E261 at least two spaces before inline comment

For the first and the last one, we chose to split the long lines rather
than adding noqa: 501. Indeed, the long lines make it very unreadable,
and there are relatively natural places where the line can be broken.
Also split a line just below the second one in a similar way.

The f-string on 1018 doesn't need to be an f-string.

Signed-off-by: Arnout Vandecappelle <arnout@mind.be>

support/scripts/pkg-stats

@@ -1010,12 +1010,13 @@ def dump_html_pkg(f, pkg):
         if pkg.latest_version['version'] is None:
             latest_version_text = "<b>Found, but no version</b>"
         else:
-            latest_version_text = f"""<a href="https://release-monitoring.org/project/{pkg.latest_version['id']}"><b>{str(pkg.latest_version['version'])}</b></a>"""
+            latest_version_text = f"""<a href="https://release-monitoring.org/project/{pkg.latest_version['id']}">""" \
+                                  f"""<b>{str(pkg.latest_version['version'])}</b></a>"""
 
         latest_version_text += "<br/>"
 
         if pkg.latest_version['status'] == RM_API_STATUS_FOUND_BY_DISTRO:
-            latest_version_text += f'found by <a href="https://release-monitoring.org/distro/Buildroot/">distro</a>'
+            latest_version_text += 'found by <a href="https://release-monitoring.org/distro/Buildroot/">distro</a>'
         else:
             latest_version_text += "found by guess"
 
@@ -1107,9 +1108,11 @@ def dump_html_pkg(f, pkg):
     if not pkg.is_status_ok("cpe"):
         if pkg.is_actual_package and pkg.current_version:
             if pkg.cpeid:
-                f.write(f"""  <br/>{pkg.status['cpe'][1]} <a href="https://nvd.nist.gov/products/cpe/search/results?namingFormat=2.3&keyword={":".join(pkg.cpeid.split(":")[0:5])}">(Search)</a>\n""") # noqa: E501
+                f.write(f"""  <br/>{pkg.status['cpe'][1]} <a href="https://nvd.nist.gov/products/cpe/search/results?"""
+                        f"""namingFormat=2.3&keyword={":".join(pkg.cpeid.split(":")[0:5])}">(Search)</a>\n""")
             else:
-                f.write(f"""  {pkg.status['cpe'][1]} <a href="https://nvd.nist.gov/products/cpe/search/results?namingFormat=2.3&keyword={pkg.name}">(Search)</a>\n""")  # noqa: E501
+                f.write(f"""  {pkg.status['cpe'][1]} <a href="https://nvd.nist.gov/products/cpe/search/results?"""
+                        f"""namingFormat=2.3&keyword={pkg.name}">(Search)</a>\n""")
         else:
             f.write("  %s\n" % pkg.status['cpe'][1])