tidy-up: miscellaneous

- drop more uses of the word "just". (not enforced here)
- drop some uses of the "will" word.
- "then" -> "than".
- tests/http/testenv/curl.py: fix copy-paste typo in error message.
- pytest: replace `shutdownh` with `shutdown` in test names.
  Spotted by GitHub Code Quality.
- comment typos.
- whitespace and newlines fixes.

Closes #21830

lib/cf-h3-proxy.c

@@ -1404,7 +1404,7 @@ static void cb_ngtcp2_rand(uint8_t *dest, size_t destlen,
   result = Curl_rand(NULL, dest, destlen);
   if(result) {
     /* cb_rand is only used for non-cryptographic context. If Curl_rand
-       failed, just fill 0 and call it *random*. */
+       failed, fill 0 and call it *random*. */
     memset(dest, 0, destlen);
   }
 }

lib/config-os400.h

@@ -238,7 +238,7 @@
 /* Size of time_t in number of bytes */
 #define SIZEOF_TIME_T           4
 
-/* Define to 1 if all of the C89 standard headers exist (not just the ones
+/* Define to 1 if all of the C89 standard headers exist (not only the ones
    required in a freestanding environment). This macro is provided for
    backward compatibility; new code need not use it. */
 #define STDC_HEADERS            1

lib/request.c

@@ -392,7 +392,7 @@ CURLcode Curl_req_send(struct Curl_easy *data, struct dynbuf *req,
   blen = curlx_dyn_len(req);
   /* if the sendbuf is empty and the request without body and
    * the length to send fits info a sendbuf chunk, we send it directly.
-   * If `blen` is larger then `chunk_size`, we can not. Because we
+   * If `blen` is larger than `chunk_size`, we can not. Because we
    * might have to retry a blocked send later from sendbuf and that
    * would result in retry sends with a shrunken length. That is trouble. */
   if(Curl_bufq_is_empty(&data->req.sendbuf) &&

lib/sendf.h

@@ -377,7 +377,7 @@ curl_off_t Curl_creader_client_length(struct Curl_easy *data);
  *                values will be ignored.
  * @return CURLE_OK if offset could be set
  *         CURLE_READ_ERROR if not supported by reader or seek/read failed
- *                          of offset larger then total length
+ *                          of offset larger than total length
  *         CURLE_PARTIAL_FILE if offset led to 0 total length
  */
 CURLcode Curl_creader_resume_from(struct Curl_easy *data, curl_off_t offset);

lib/setopt.c

@@ -2774,7 +2774,7 @@ static CURLcode setopt_offt(struct Curl_easy *data, CURLoption option,
     break;
   case CURLOPT_MAX_SEND_SPEED_LARGE:
     /*
-     * When transfer uploads are faster then CURLOPT_MAX_SEND_SPEED_LARGE
+     * When transfer uploads are faster than CURLOPT_MAX_SEND_SPEED_LARGE
      * bytes per second the transfer is throttled..
      */
     if(offt < 0)

lib/url.c

@@ -980,7 +980,7 @@ static bool url_match_destination(struct connectdata *conn,
       return FALSE;
     }
   }
-  /* Scheme mismatch is acceptable, just compare hostname/port */
+  /* Scheme mismatch is acceptable, compare hostname/port */
   return Curl_peer_same_destination(m->needle->origin, conn->origin);
 }
 

lib/urlapi.c

@@ -480,7 +480,7 @@ static CURLUcode hostname_check(struct Curl_URL *u, char *hostname,
       /* more than one trailing dot is not allowed */
       return CURLUE_BAD_HOSTNAME;
     else if((hlen == 1) && (hostname[0] == '.'))
-      /* just a single dot is not allowed */
+      /* a single dot alone is not allowed */
       return CURLUE_BAD_HOSTNAME;
   }
   return CURLUE_OK;

lib/vquic/curl_ngtcp2.c

@@ -1697,7 +1697,7 @@ static CURLcode h3_stream_open(struct Curl_cfilter *cf,
       stream->upload_left = -1; /* unknown */
     break;
   default:
-    /* there is not request body */
+    /* there is no request body */
     stream->upload_left = 0; /* no request body */
     break;
   }