Fixes spacing.

examples/technical_report/Isabelle_DOF-Manual/document/root.bib

@@ -20,16 +20,10 @@
 @Manual{	  wenzel:isabelle-isar:2019,
   title		= {The Isabelle/Isar Reference Manual},
   author	= {Makarius Wenzel},
-  OPTorganization = {},
-  OPTaddress =   {},
-  OPTedition =   {},
-  OPTmonth =     {},
-  year =      {2019},
-  note =      {Part of the Isabelle distribution.},
-  OPTannote =    {}
+  year		= 2019,
+  note		= {Part of the Isabelle distribution.}
 }
 
-
 @InCollection{	  brucker.ea:isabelledof:2019,
   abstract	= {DOF is a novel framework for defining ontologies and
 		  enforcing them during document development and evolution. A
@@ -124,7 +118,7 @@
   title		= {{CENELEC} 50128 and {IEC} 62279 Standards},
   publisher	= {Wiley-ISTE},
   year		= 2015,
-  address	= {Boston},
+  address	= {Boston}
 }
 
 @Booklet{	  cc:cc-part3:2006,
@@ -242,7 +236,7 @@
   volume	= 8558,
   publisher	= pub-springer,
   year		= 2014,
-  doi		= {10.1007/978-3-319-08970-6},
+  doi		= {10.1007/978-3-319-08970-6}
 }
 
 @InProceedings{	  bezzecchi.ea:making:2018,
@@ -315,7 +309,6 @@
 }
 
 %%%%%%%%%%%%%%%%%%%%%%
-
 @Misc{		  datarefman19,
   title		= {Defining (Co)datatypes and Primitively (Co)recursive
 		  Functions in Isabelle/HOL},
@@ -359,7 +352,7 @@
   booktitle	= {UITP},
   pages		= {84--94},
   year		= 2014,
-  doi		= {10.4204/EPTCS.167.10},
+  doi		= {10.4204/EPTCS.167.10}
 }
 
 @InProceedings{	  DBLP:conf/mkm/BarrasGHRTWW13,
@@ -372,7 +365,7 @@
   booktitle	= {MKM},
   pages		= {359--363},
   year		= 2013,
-  doi		= {10.1007/978-3-642-39320-4_29},
+  doi		= {10.1007/978-3-642-39320-4_29}
 }
 
 @Article{	  Faithfull:2018:COQ:3204179.3204223,
@@ -488,7 +481,6 @@
 		  the development, deployment and maintenanceactivities.}
 }
 
-
 @Article{	  Regular-Sets-AFP,
   author	= {Alexander Krauss and Tobias Nipkow},
   title		= {Regular Sets and Expressions},
@@ -552,5 +544,5 @@
 @Book{		  eijkhout:latex-cs:2012,
   author	= {Victor Eijkhout},
   title		= {The Computer Science of TeX and LaTeX},
-  year		= 2012,
+  year		= 2012
 }