tidy-up: do/while formatting

Also fix an indentation and delete empty lines.

Closes #1440

example/scp_write.c

@@ -187,7 +187,6 @@ int main(int argc, char *argv[])
                 nread -= (size_t)nwritten;
             }
         } while(nread);
-
     } while(1);
 
     fprintf(stderr, "Sending EOF\n");

example/sftp_RW_nonblock.c

@@ -276,7 +276,6 @@ int main(int argc, char *argv[])
             fprintf(stderr, "SFTP download timed out: %d\n", rc);
             break;
         }
-
     } while(1);
 
     libssh2_sftp_close(sftp_handle);

example/sftp_append.c

@@ -216,7 +216,6 @@ int main(int argc, char *argv[])
             ptr += nwritten;
             nread -= (size_t)nwritten;
         } while(nread);
-
     } while(nwritten > 0);
 
     libssh2_sftp_close(sftp_handle);

example/ssh2_agent_forwarding.c

@@ -251,8 +251,7 @@ int main(int argc, char *argv[])
                     fprintf(stderr, "libssh2_channel_read returned %ld\n",
                             (long)nread);
             }
-        }
+        } while(nread > 0);
-        while(nread > 0);
 
         /* this is due to blocking that would occur otherwise so we loop on
            this condition */

example/ssh2_exec.c

@@ -262,8 +262,7 @@ int main(int argc, char *argv[])
                     fprintf(stderr, "libssh2_channel_read returned %ld\n",
                             (long)nread);
             }
-        }
+        } while(nread > 0);
-        while(nread > 0);
 
         /* this is due to blocking that would occur otherwise so we loop on
            this condition */

src/pem.c

@@ -126,8 +126,7 @@ _libssh2_pem_parse(LIBSSH2_SESSION * session,
         if(readline(line, LINE_SIZE, fp)) {
             return -1;
         }
-    }
+    } while(strcmp(line, headerbegin) != 0);
-    while(strcmp(line, headerbegin) != 0);
 
     if(readline(line, LINE_SIZE, fp)) {
         return -1;
@@ -323,8 +322,7 @@ _libssh2_pem_parse_memory(LIBSSH2_SESSION * session,
         if(readline_memory(line, LINE_SIZE, filedata, filedata_len, &off)) {
             return -1;
         }
-    }
+    } while(strcmp(line, headerbegin) != 0);
-    while(strcmp(line, headerbegin) != 0);
 
     *line = '\0';
 
@@ -722,8 +720,7 @@ _libssh2_openssh_pem_parse(LIBSSH2_SESSION * session,
         if(readline(line, LINE_SIZE, fp)) {
             return -1;
         }
-    }
+    } while(strcmp(line, OPENSSH_HEADER_BEGIN) != 0);
-    while(strcmp(line, OPENSSH_HEADER_BEGIN) != 0);
 
     if(readline(line, LINE_SIZE, fp)) {
         return -1;
@@ -803,8 +800,7 @@ _libssh2_openssh_pem_parse_memory(LIBSSH2_SESSION * session,
         if(readline_memory(line, LINE_SIZE, filedata, filedata_len, &off)) {
             return -1;
         }
-    }
+    } while(strcmp(line, OPENSSH_HEADER_BEGIN) != 0);
-    while(strcmp(line, OPENSSH_HEADER_BEGIN) != 0);
 
     *line = '\0';
 

src/scp.c

@@ -784,7 +784,7 @@ scp_recv_error:
     tmp_err_code = session->err_code;
     tmp_err_msg = session->err_msg;
     while(libssh2_channel_free(session->scpRecv_channel) ==
-           LIBSSH2_ERROR_EAGAIN);
+          LIBSSH2_ERROR_EAGAIN);
     session->err_code = tmp_err_code;
     session->err_msg = tmp_err_msg;
     session->scpRecv_channel = NULL;