Found the following HTML validation problems:
adminlte_color.html:56:44: Warning: trimming empty <span>
adminlte_color.html:60:36: Warning: trimming empty <span>
adminlte_color.html:64:39: Warning: trimming empty <span>
adminlte_color.html:68:35: Warning: trimming empty <span>
adminlte_color.html:72:40: Warning: trimming empty <span>
adminlte_color.html:76:21: Warning: trimming empty <span>
adminlte_color.html:80:21: Warning: trimming empty <span>
adminlte_color.html:84:21: Warning: trimming empty <span>
adminlte_color.html:88:22: Warning: trimming empty <span>
adminlte_color.html:92:21: Warning: trimming empty <span>
adminlte_color.html:96:23: Warning: trimming empty <span>
adminlte_color.html:100:24: Warning: trimming empty <span>
adminlte_color.html:104:23: Warning: trimming empty <span>
adminlte_color.html:108:23: Warning: trimming empty <span>
adminlte_color.html:112:22: Warning: trimming empty <span>
adminlte_color.html:116:21: Warning: trimming empty <span>
bs4dash_color.html:59:13: Warning: trimming empty <span>
bs4dash_color.html:63:13: Warning: trimming empty <span>
bs4dash_color.html:67:13: Warning: trimming empty <span>
bs4dash_color.html:71:13: Warning: trimming empty <span>
bs4dash_color.html:75:13: Warning: trimming empty <span>
bs4dash_color.html:79:13: Warning: trimming empty <span>
bs4dash_color.html:83:13: Warning: trimming empty <span>
bs4dash_color.html:87:13: Warning: trimming empty <span>
bs4dash_color.html:91:13: Warning: trimming empty <span>
bs4dash_color.html:95:13: Warning: trimming empty <span>
bs4dash_color.html:99:13: Warning: trimming empty <span>
bs4dash_color.html:103:13: Warning: trimming empty <span>
bs4dash_color.html:107:13: Warning: trimming empty <span>
bs4dash_color.html:111:13: Warning: trimming empty <span>
bs4dash_color.html:115:13: Warning: trimming empty <span>
bs4dash_color.html:119:13: Warning: trimming empty <span>
bs4dash_color.html:123:13: Warning: trimming empty <span>
bs4dash_color.html:127:13: Warning: trimming empty <span>
bs4dash_color.html:131:13: Warning: trimming empty <span>
bs4dash_color.html:135:13: Warning: trimming empty <span>
bs4dash_status.html:47:13: Warning: trimming empty <span>
bs4dash_status.html:51:13: Warning: trimming empty <span>
bs4dash_status.html:55:13: Warning: trimming empty <span>
bs4dash_status.html:59:13: Warning: trimming empty <span>
bs4dash_status.html:63:13: Warning: trimming empty <span>
bs4dash_status.html:67:13: Warning: trimming empty <span>
bs4dash_status.html:71:13: Warning: trimming empty <span>
bs4dash_status.html:75:13: Warning: trimming empty <span>
bs_vars_color.html:51:28: Warning: trimming empty <span>
bs_vars_color.html:55:28: Warning: trimming empty <span>
bs_vars_color.html:59:25: Warning: trimming empty <span>
bs_vars_color.html:63:28: Warning: trimming empty <span>
bs_vars_color.html:67:27: Warning: trimming empty <span>