style: preferred double quotes

Author: neo87cs

.devcontainer/Dockerfile

@@ -10,6 +10,11 @@ RUN if [ "${NODE_VERSION}" != "none" ]; then su vscode -c "umask 0002 && . /usr/
 # RUN apt-get update && export DEBIAN_FRONTEND=noninteractive \
 #     && apt-get -y install --no-install-recommends chromium
 
+# Allow yarn key
+ENV YARNKEY=yarn-keyring.gpg
+RUN curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | sudo gpg --dearmour -o /usr/share/keyrings/$YARNKEY && \
+echo "deb [signed-by=/usr/share/keyrings/$YARNKEY] https://dl.yarnpkg.com/debian stable main" | sudo tee /etc/apt/sources.list.d/yarn.list
+
 # OS packages required to run the application
 RUN apt-get update && export DEBIAN_FRONTEND=noninteractive \
     && apt-get -y install --no-install-recommends \

lib/ferrum/client/web_socket.rb

@@ -19,7 +19,7 @@ def initialize(url, max_receive_size, logger)
         uri     = URI.parse(@url)
         port    = uri.port || DEFAULT_PORTS[uri.scheme]
 
-        if port == 443 || url.scheme == 'wss'
+        if port == 443 || url.scheme == "wss"
           tcp = TCPSocket.new(uri.host, port)
           ssl_context = OpenSSL::SSL::SSLContext.new
           @sock = OpenSSL::SSL::SSLSocket.new(tcp, ssl_context)